▎ 摘　　要

NOVELTY - Preparation of composite electrode material of graphene/lithium vanadium pentoxide (LixV2O5), comprises: (1) dissolving ammonium metavanadate and polyethylene glycol (PEG)-400 in absolute ethyl alcohol, mixing, dropping concentrated nitric acid into the mixed solution, and stirring uniformly; adding lithium chloride (LiCl) into the mixed solution, stirring, and dripping concentrated nitric acid in absolute ethyl alcohol; (2) carrying out hydrothermal reaction, centrifuging and cleaning, obtaining LixV2O5 hollow microsphere precursor after dry performing heat treatment to obtain LixV2O5 hollow microsphere; (3) dissolving ethyl cellulose in absolute ethyl alcohol, adding graphene, dispersing uniformly, adding terpineol to obtain graphene ink, adding the LixV2O5 hollow microsphere into graphene ink, heating and stirring; and (4) coating the graphene/LixV2O5 mixed slurry on the aluminum foil, drying, punching sheet, and carrying out heat treatment for decomposing ethyl cellulose. USE - Preparation method of composite electrode material of graphene/LixV2O5 used in lithium ion battery (claimed). ADVANTAGE - The graphene/LixV2O5 composite electrode material exhibits more excellent cycle stability and multiplying power performance. The graphene has high conductivity and high mechanical strength, and enhances electron and ion mobility of the electrode material, and improves the conductive performance and electrochemical performance of the composite electrode. The raw material price is low, and the preparation condition is simple and easy to control. DETAILED DESCRIPTION - Preparation of composite electrode material of graphene/LixV2O5, comprises: (1) dissolving ammonium metavanadate and PEG-400 in absolute ethyl alcohol, mixing uniformly, dropping the concentrated nitric acid into the mixed solution, and stirring uniformly; adding LiCl into the mixed solution, stirring to obtain reaction liquid; and dripping 1 mL concentrated nitric acid in each 40 mL absolute ethyl alcohol; (2) carrying out hydrothermal reaction for the reaction solution, after finishing reaction, centrifuging and cleaning the reaction product, obtaining LixV2O5 hollow microsphere precursor after dry performing heat treatment to the LixV2O5 hollow microsphere precursor to obtain LixV2O5 hollow microsphere; where the hydrothermal reaction conditions are as follows: keeping the temperature for 20 hours at 180degrees Celsius; and the heat treatment conditions are as follows: room temperature heating to 350degrees Celsius for 3 hours, and naturally cooling; (3) dissolving the ethyl cellulose in absolute ethyl alcohol, adding graphene, dispersing uniformly, adding terpineol to obtain graphene ink, adding the LixV2O5 hollow microsphere into graphene ink, heating and stirring until the absolute ethyl alcohol is evaporated to dryness, obtaining the mixed slurry of graphene; and (4) coating the graphene/LixV2O5 mixed slurry on the aluminum foil, drying, punching sheet, and carrying out heat treatment for decomposing ethyl cellulose.